[libvirt] [RFC v3 0/4] update NVDIMM support

[Luyao Zhong]

Hi libvirt experts,

This is the RFC v3 for updating NVDIMM support in libvirt.

There are some gaps between qemu and libvirt, libvirt has not
supported several config options about NVDIMM memory while
qemu is ready now, including 'align', 'pmem', 'unarmed'.

I reworded and recoded my patches according to some feedback
comments from community once more.

But I met some issues I can't handle. I list them as follows:

a. add qemu_capabilities check
I want to add some nvdimm-related qemu_capabilities check, just
like 'QEMU_CAPS_OBJECT_MEMORY_FILE_ALIGN' in patch 2/4, and
I try to add the relevant sections into *.replies files manually.
But the qemucapabilitiestest failed, I don't know why. It seems
something wrong with the *.replies file. I think the *.replies
doesn't depends on other code or file, right? Could you help me address
this issue? The test log doesn't give me any useful info.

b. DO_TEST & DO_TEST_CAPS_LATEST
In the previous patches, several experts suggest me using
DO_TEST_CAPS_LATEST, but the testcases will fail. I guess it may
be related to the qemu_capabilities check I mentioned above. I'm
not sure if this issue will disappeared when the first one is be
resolved.

Besides, the whole nvdimm stuff do not introduce enough qemu_capabilities
check and do not use DO_TEST_CAPS_LATEST. Maybe it is better to do these
modification in another patch set. Or we can rely on qemu errors, it's just
what libvirt do currently. What' your comments?

Thank you in advance.

Regards,
Luyao Zhong

Luyao Zhong (4):
  nvdimm: introduce more config elements into xml for NVDIMM memory
  nvdimm: add nvdimm-related qemucapabilities check
  nvdimm: update qemu command-line generating for NVDIMM memory
  nvdimm: update news.xml

 docs/formatdomain.html.in                          | 80 ++++++++++++++++++----
 docs/news.xml                                      |  9 +++
 docs/schemas/domaincommon.rng                      | 23 ++++++-
 src/conf/domain_conf.c                             | 61 +++++++++++++++--
 src/conf/domain_conf.h                             |  3 +
 src/qemu/qemu_capabilities.c                       |  8 ++-
 src/qemu/qemu_capabilities.h                       |  4 ++
 src/qemu/qemu_command.c                            | 32 +++++++++
 tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml |  1 +
 tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml   |  1 +
 tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml   |  1 +
 tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml  |  1 +
 tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml    |  1 +
 tests/qemucapabilitiesdata/caps_3.0.0.riscv32.xml  |  1 +
 tests/qemucapabilitiesdata/caps_3.0.0.riscv64.xml  |  1 +
 tests/qemucapabilitiesdata/caps_3.0.0.s390x.xml    |  1 +
 tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml   |  1 +
 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml    |  2 +
 tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml   |  2 +
 .../memory-hotplug-nvdimm-align.args               | 31 +++++++++
 .../memory-hotplug-nvdimm-align.xml                | 58 ++++++++++++++++
 .../memory-hotplug-nvdimm-pmem.args                | 31 +++++++++
 .../memory-hotplug-nvdimm-pmem.xml                 | 58 ++++++++++++++++
 .../memory-hotplug-nvdimm-unarmed.args             | 31 +++++++++
 .../memory-hotplug-nvdimm-unarmed.xml              | 58 ++++++++++++++++
 tests/qemuxml2argvtest.c                           | 11 +++
 .../memory-hotplug-nvdimm-align.xml                |  1 +
 .../memory-hotplug-nvdimm-pmem.xml                 |  1 +
 .../memory-hotplug-nvdimm-unarmed.xml              |  1 +
 tests/qemuxml2xmltest.c                            |  3 +
 30 files changed, 491 insertions(+), 26 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.args
 create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.xml
 create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.args
 create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.xml
 create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.args
 create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.xml
 create mode 120000 tests/qemuxml2xmloutdata/memory-hotplug-nvdimm-align.xml
 create mode 120000 tests/qemuxml2xmloutdata/memory-hotplug-nvdimm-pmem.xml
 create mode 120000 tests/qemuxml2xmloutdata/memory-hotplug-nvdimm-unarmed.xml

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2.7.4